Final answer:
After comparing the ratio 17/2 to the known values of sine, cosine, and tangent for 63 degrees, it is clear that none of these trigonometric functions match the given ratio. Therefore, the correct answer is 'd. None of the above.'
Step-by-step explanation:
The question asks us to determine which trigonometric function of 63 degrees is equivalent to the ratio 17/2. To find this, we would typically use a calculator or trigonometric tables, as the given ratios in the question do not match common trigonometric values learned through various mathematical formulas such as those from the Law of Sines or Law of Cosines, which help solve for angles and sides in triangles.
Trigonometric functions such as sin, cos, and tan for specific angles are fixed values. For a ratio of 17/2 or 8.5, we can directly compare this with known values of trigonometric functions for 63 degrees. Given that no common trigonometric identities or special angles match the ratio of 17/2, the correct answer can be stated with confidence as 'd. None of the above.'